Urban landfills investigation for leachate assessment using electrical resistivity imaging in Johor, Malaysia

Zaini, Muhammad Syamsul Imran; Hasan, Muzamir; Zolkepli, Muhammad Farhan

doi:10.1016/j.envc.2021.100415

Cited by 29 publications

(17 citation statements)

References 27 publications

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“…However, due to the negative impact resulting from using cement as a soil stabilizer, the construction industry is now migrating to a better approach of utilizing an alternative soil stabilizer that is more environmentally friendly 8 – 10 . Nonetheless, there is a need to identify suitable substitute binders that can replace cement 11 – 13 , thus enhancing the problematic and expansive soil characteristics that would have a beneficial economic impact and be environmentally friendly for the construction application 14 – 17 .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on physico-mechanical properties of kaolinite clay soil stabilized at optimum silica fume content using clamshell ash and lime

Zaini,

Hasan,

Almuaythir

et al. 2024

Sci Rep

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This investigation examines the effect of clamshell ash (CSA) and lime additives on the physico-mechanical characteristics of kaolinite clay soil stabilized at the optimum silica fume content. Laboratory tests were performed to assess plasticity, shrink-swell characteristics, compaction characteristics, unconfined compressive strength (UCS), shear strength characteristics, mineralogical and morphological microstructure characteristics of stabilized soil specimens. The kaolinite clay soil was stabilized at its optimum silica fume content (6%) to produce the highest strength and was altered with three non-identical proportions of clamshell ash and lime (3%-9%). Cylindrical soil specimens, 76 mm in height and 38 mm in diameter, were moulded and treated for curing periods of 1, 7, 14, and 30 days to examine the strength of the altered soil. The findings revealed that, adding clamshell ash and lime significantly alters the plasticity, shrink-swell, maximum dry unit weights, and optimum moisture contents of the silica fume-stabilized soil. In terms of strength, the beneficial effects of CSA and lime additives were found to be more significant with more extended curing periods. Incremental increases in curing periods resulted in further enhancements in UCS, cohesion, and internal friction angle, indicating continued strength development over time. Microstructural analysis using field emission scanning electron microscopy and X-ray diffraction provided insights into the interparticle bonding mechanisms and microstructural changes induced by the addition of CSA and lime. The emergence of cementitious phases and pozzolanic responses between soil particles and stabilizers contributed to the densification and strengthening of the stabilized soil matrix. The findings of this study provide valuable insights into the potential of clamshell ash and lime additives to enhance the engineering properties of kaolinite clay soil stabilized with silica fume. These results have implications for sustainable soil stabilization practices, offering a promising approach to improve the performance of soils for various engineering applications, including construction and geotechnical projects.

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Section: Introductionmentioning

confidence: 99%

Experimental investigations on physico-mechanical properties of kaolinite clay soil stabilized at optimum silica fume content using clamshell ash and lime

Zaini,

Hasan,

Almuaythir

et al. 2024

Sci Rep

Self Cite

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“…In Malaysia, a recent study reported that the leachate from the Simpang Renggang landfill had high volumes of COD (1712-1633 mg/l), biological oxygen demand (137-138 mg/l), ammonia (405 mg/l), and suspended solids (341-359 mg/l), exceeding Malaysian standards (Detho et al, 2020;Zaini et al, 2022). The disposal of a large volume of mixed waste in landfills also contributes to the emission of greenhouse gases (GHGs) and other toxic pollutants such as non-methane organic compounds (NMVOCs) (Wu et al, 2018;Cheng et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

Estimation of Leachate Volume and Treatment Cost Avoidance Through Waste Segregation Programme in Malaysia

Rangga,

Syed Ismail,

Rasdi

et al. 2023

JST

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This study aims to calculate the avoided leachate volume and treatment cost from waste segregation practices compared to the existing waste disposal methods of landfilling. The mathematical equations were used to analyse the waste segregation rate, leachate volume and treatment cost. The study findings reveal that 99.4% of mixed waste was disposed of in landfills, resulting in an annual generation of 565 thousand cubic meters (m3) of leachate with an estimated treatment cost of MYR 19.82 million (USD 4.36 million). The segregated waste, which accounts for only 0.06%, reduces 354 m3 in leachate volume and a cost-saving of MYR 12.42 thousand (USD 2.73 thousand) in the treatment expenses per year. The findings concluded that waste segregation practice could reduce waste management costs by reducing leachate production and treatment costs and environmental impacts.

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“…The last zone type is the low resistivity plume (2.5-8 Ω•m) which can be interpreted as a leachate plume or saturated waste zone. Previous studies have reported that materials saturated by leachate or water have electrical resistivity values of less than 2.5 to 10 Ω•m [2,[32][33][34][35]. Leachate usually shows low resistivity due to intense ion dissolution, which can maintain electrical conductivity within the plume [36,37].…”

Section: Resistivity Models From Forward Modelingmentioning

confidence: 99%

Evaluation of the Proper Electrode Spacing for ERI Surveys in Open Dumpsites Using Forward Modeling

Chungam¹,

Vinitnantharat²,

Wangyao³

2022

Pol. J. Environ. Stud.

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Electrical resistivity imaging surveys are widely conducted in waste disposal sites due to their ease of operation and accurate results; however, some essential measurement parameters, such as optimal electrode spacing, have not been thoroughly evaluated. Accordingly, this study aims to identify the optimal electrode spacing for electrical resistivity surveys in open dumpsites. An electrical resistivity survey was conducted at the Nonthaburi disposal site, Thailand, and the results were compared to synthetic cases simulated using the forward modeling technique. Electrode spacing values of 2, 2.5, 4, and 5 m were used. The models were evaluated using the Nash-Sutcliffe model efficiency coefficient, model sensitivity, and root mean square error. The real case survey results illustrate that small electrode spacings of 2 and 2.5 m provide a realistic model, however, the root mean square error is higher due to the use of more outlier electrodes during measurement. Consistent with the synthetic case studies, electrode spacing values of 2 and 2.5 m yielded accurate inverted models. Overall, this study illustrates the benefits of using a forward modeling technique for selecting the optimal electrode spacing for open dumpsite surveys.

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Urban landfills investigation for leachate assessment using electrical resistivity imaging in Johor, Malaysia

Cited by 29 publications

References 27 publications

Experimental investigations on physico-mechanical properties of kaolinite clay soil stabilized at optimum silica fume content using clamshell ash and lime

Experimental investigations on physico-mechanical properties of kaolinite clay soil stabilized at optimum silica fume content using clamshell ash and lime

Estimation of Leachate Volume and Treatment Cost Avoidance Through Waste Segregation Programme in Malaysia

Evaluation of the Proper Electrode Spacing for ERI Surveys in Open Dumpsites Using Forward Modeling

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